Geographical Terms include two basic entities that are located in the geographical area: settlements and wider geographical / cultural / administrative units and areas, where the above settlements belonged at some point in time.

Especially regarding the area of the Black Sea, tombs appear as a distinctive category for the period of antiquity. The ecclesiastical units that appear as a distinctive category for modern times include the Greek-Orthodox metropoleis of the area.

Settlements include all residential units, for which there are testimonies of even the slightest Hellenic presence through time. The entries include:

- Presentation of the diachronic evolution of each settlement’s name in Greek and any other established language (includes etymological elements and diachronic identifications).- A geographical and administrative location, as accurate as possible.· - A presentation of each settlement’s character from the point of view of Anthropogeography and General History, with emphasis on Economy, Education and Culture. At the same time, aspects of the secular and religious life, public and private life are also emphasized. Buildings and monuments, elements of the architectural environment, are also mentioned.

The areas and units include the political and ecclesiastical schemes that appeared at the largest part of the area under examination and had a relevant life span. In addition, they include wider areas of geographical / cultural character, which probably in some stage of their historical course were distinct administrative schemes, for example Crimea. The specific entries include:

- Presentation of their names’ evolution (includes etymological elements and identifications).· - Geographical location and statement of their position in the hierarchy of the political and ecclesiastical administrative system. - Geophysical description of each administrative union with geographical and demographical elements as well as information regarding the natural wealth and the most important aspects of the economic life.